Support for pistons.



Mia-20,695 PATBNTED MAY 15, 1906.

BRAMMER.

SUPPORT FOR PISTONS. APPLIOATICN FILED UNE 26, 1905.

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Specification of Letters Patent.

lPatentea May 1 5, 1.966.

Application filed June 26. 1905. Serial No. 267,073.

To all whom zit may concern:

Be it known that 1, JAMES BRAMMER, a citizen of the United States, and aresident of St. Louis, Missouri, have invented certain new and usefulImprovements in Guides and Supports for Pistons and Piston-Valves, ofwhich the following is a specification containing a fnll,'. clear, andexact description, reference being hadto the accompanying drawings,forming a part hereof.

The various Oblcts of my invention are as follows: first, to lighten theworking parts of engines and pumps; second, to do away with packing andpacking-glands, vibrationcups, j unk-rings, springs on engines or valveswhich have extension piston-rods and, consequently, third, to dispensewith all leaks in the front cylinder-head.

My invention may -be applied to piston valves as well as to pistons ofengines or pumps.

In the drawings, Figure 1 is a sectional side elevation of a cylinderand piston having my invention applied thereto. a section on line 2 2 ofFig. 1.

1 indicates the usual cylinder for containing the piston or piston-valve2 and having at one end a common stufling-boz r 3. The piston 2 issecurely fixed to one end of the piss ton rod eby any of the ordinaryfastening devices. The said piston-rod 4 is provided with an axial bore5, which opens upon the interior of the cylinder and within which ismounteda supportin -bar 6. Said supporting-bar 6 projects within thecylinder, and its outer end 7 is preferably squared or otherwisearranged to be engaged by acommon wrench. A screw-threaded conicalenlargement '8 is formed on said supporting-bar at a oint near its outerend, and said tapered enl argenient is mounted within a threaded seatformed in the cylinder-head 9. Formed in the periphery of saidsupporting-bar 6 are a Series of grooves 10, which extend longitudinallythereof from the conical enlargement 8 to the inner end of the said bar.

The operation is as-follows: As the piston or pistou valve reci rocateswithin the cylin der its weight will e supported by the sup- )ortin bar6. and all wear of thee. 'linder l a due to the weight of the piston orpistonvalve will be prevented.

The device is self-lubricating, as it will be lubricated by thelubricant which is sent into the cylinder for the purpose of lubricatingthe piston or p ston-valve.

Fig. 2 is.

The outer end of the supporting-bar is made square or angular in orderthat said bar maybe quickly removed after becoming worn and a new onesubstituted therefor.

The supporting-bars can be made' in large quantities of standardsize,-especially for use 1 upon locomotives, in order to interchangeablySaid supportin -harsfit all -.cylinder-heads. may, of course, be made tofit all the different sizes of pistons.

The grooves 1( permit the steam or other filll(l to escape from the bore5 during operation, and thereby permit the piston-rod to work freelyupon the supporting-bar.

I do not limit myself to the exact construction herein shown, asmodifications may be made by skilled mechanicsjwithout departing fromthe scope of my invention.

' l/Vhat I claimisfor pistons and piston-valves, comprisin asupporting-bar fixed at one end to the cy in der-headandits opposite endprojecting free; said supporting-bar havin a venting-groove andextending within a hollow piston and piston-rod.

2. The herein-described guide and support for pistons and piston-valves,comprisin a supporting-bar fixed at one end to the cylinder-head andprojecting Within the cylinder,

in combination with a piston and piston-rod,fl

1., The herein-described guide andgsupport said supporting'bar having ascrew-threaded conical enlargement near its outer end.

3. The herein-described guide and support for pistons and piston-valves,comprisin a supporting-bar fixed at one end to the cy inder-head andprojecting within the cylinder,

' in combination with a piston and pistonrod,

said supporting-bar having escrow-threaded conical enlargement near itsouter end; said piston-rod having an axial bore within which saidsupporting ar extends, the saidparts means for permitting the saidsupporting-bar to pass freely within the bore of the piston- Intestimony whereof I have signed my name to this specification inpresence of two subscribing w! tnesses.

JAMES BRAM'MER.

Witnesses:

M. P. Snrrn, E. M. Hannmc'ron.

being also provided with suitable venting

